
package com.mbbmap.util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class MD5Helper {

 
    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
        	int halfbyte = (data[i] >>> 4) & 0x0F;
        	int two_halfs = 0;
        	do {
	        	if ((0 <= halfbyte) && (halfbyte <= 9))
	                buf.append((char) ('0' + halfbyte));
	            else
	            	buf.append((char) ('a' + (halfbyte - 10)));
	        	halfbyte = data[i] & 0x0F;
        	} while(two_halfs++ < 1);
        }
        return buf.toString();
    }
 
	public static String hash(String text) 
	throws NoSuchAlgorithmException, UnsupportedEncodingException  {
		MessageDigest md;
		md = MessageDigest.getInstance(Constants.MD5);
		byte[] md5hash = new byte[32];
		md.update(text.getBytes(Constants.CHARSET_ENCODING), 0, text.length());
		md5hash = md.digest();
		return convertToHex(md5hash);
	}

    
    public static void main(String[] args) {
        
        try {
            System.out.println(MD5Helper.hash("sysadm3456"));
        }
        catch (Exception e) {
            System.err.println(e);
        }
        
    }
}
